OS Upgrade path for Brocade 300.

I need to upgrade some Brocade 300 switches sourced from Dell. I've been looking online but am struggling to find a list of allowed upgrade paths that covers the versions I'd like to go from and to. I'm also hoping to upgrade purely through the GUI, not using the command line, as I'm not at all familiar with FABOS.

I have four of the switches in two seperate fabrics.

Three of the units are on 6.1.0c and one of them (somehow) is on 6.4.0b.

Niether of these versions are support by our SAN vendor so we need to get them upgraded as soon a spossible.

Since we have two fabrics in a redundant configuration, I'm not worried about rebooting the switches. My plan was to upgrade one fabric, then the other.

Can someone tell me which versions of the Fabric OS to request from Dell so I can get, in as fewer steps as posible, to Version 7.0.1?

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